Self-lubricating and dust-proof bearing for colter or other shafts.



Patented Dec. 25, I900.

I 2 Shaeta-$heot l.

8" Oaufozfi Robert WCoom 6.5.

I R. W. CUDHBS &'-L. A. BROOKS;

SELF LUBRIOATING AND BUSI PROOF BEARING FOROOLTERS OR OTHER SHAFTS.

A monium filed Mar. 24, 1900.

(No Model.)

HE scams mans 00.. PHOTO-LXTHOOWASHXNG n n c No. 664,724. Patented Dec.25, I900. R. W. CDUMBS' & L. A. BROOKS. SELF LUBBICATING AND DUSTPROM-BEARING FOR COLTERS OR OTHER SHAFTS.

(Applicltion filed Mar 24, 1900.) (No Model.) 2 Sheets-Sheet 2.

. 51m cemoLS Robe 91 W. C0091? $5 Lou z'sJsaB rooms 3X11 i ncooao UNITEDSTATES PATENT OFFICE.

ROBERT W. OOOMBS AND LOUIS A. BROOKS, OF LARIMORE, NORTH DAKOTA:

SELF-LUBRICATING AND DUST-PROOF BEARING FOR (IOLTER OR OTHER SHAFTS.

SPECIFICATION forming part of Letters Patent No. 664,724, dated December25, 196C.

I Application filed March 24,1900. Serial No. 10,075. (No model.)

To all whom it may concern.-

Be it known that we, ROBERT W. OooMBs and LOUIS A. BROOKS, citizens ofthe United States, residing at Larimore, in the county of Grand Forksand State of North Dakota, have invented certain new and usefulImprovements in Self-Lubricating and Dust-Proof Bearings for Oolter orother Shafts; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to a self-lubricating and dust-proof bearing forplow-colter and other shafts, one object in View being to provide aconstruction of shaft-journal and box or bearingembodying simplicity andstrength and adapted to prevent the entrance of dust and dirt and theescape of the oil or other lubricant used.

The invention further has for its object to provide a simple, strong,and durable construction of colter and carrying-yoke, the latter havingimproved means for connecting the sections of the bearing-box to obviatecasual displacement thereof'and maintain the cooperating parts in properrelation.

In the drawings hereto annexed and forming a part of this specification,Figure l is a rear perspective view of a plow-colter constructed inaccordance with the invention. Fig. 2 is a vertical longitudinal sectionthrough the colter, axle, and bearing-boxes. Fig. 3 is a transversesection through the shaft and one of the bearing-boxes. Fig. 4 is aperspective View of the yoke. Fig. 5 shows an inner and an outerperspective view of one of the box-sections. Fig. 6 is a perspectiveview of a shaft-section. Fig. 7 is a sectional view showing amodification.

Like reference characters are employed in the following description andannexed drawings to designate corresponding parts throughout the severalviews.

1 represents a rolling plow-colter comprising a disk vertically disposedand adapted to run in advance of the plowshare in the usual way. Thisdisk is mounted upon a shaft, which may be made of a single continuouspiece of metal passed through the disk and suitably secured thereto,butis preferably composed of corresponding sections 2 and 3,

provided at their inner ends with heads or annular flanges 5, which bearupon opposite sides of the disk and clamp the same bet-ween them, rivetsor other suitable fastening devices being employed to hold the partsconnected. By this construction the disk is reinforced and strengthenedand a firmer and more stable connection between the shaft and disksecured.

Each shaft-section is provided at its outer end with a journal 6 and adirt-excluding collar 7. The journal is formed by enlarging the outerend of the shaft-section and giving it the general form of a tuber orknob and, preferably, by making said enlargement of pear form, the basebeing at the outer extremity and the sides thence tapered inwardly andmerging into the line of the body portion of the shaft-section at thebase of the'outer side of the collar 7. The collar is thus located atWhat may be called the inner end of the neck portions of the journal,and its outer side is curved or rounded on a bevel to diminish friction,while its inner side is straight or flat to form a right-angularshoulder or stop to effectually prevent the entrance of dirt, dust, andsand into the space between the journal and box and lodging in thesand-chamber. It is preferable to make the collar of the same diameteras the shaft; but it may be made slightly larger, if desired.

The shaft-journals are mounted to revolve in boxes 9, carried by theyoke 10. These boxes are of like formation, and each comprises top andbottom sections 11 and 12, said sections consisting of plates providedwith ears or projections 13, having screw-threaded openings for passageof screw-bolts or other suitable fastening devices to secure themtogether and to the yoke. Any other construction of fastening means may,however, be employed. The central portions of the box sections or platesare pressed or swelled outwardly to form ofistandingpear-shaped'concavo-convex walls 14., forming in conjunction abearing-chamber for the reception of the journal, the latter beingdesigned to fit snugly and without binding and to turn easily therein.Near their inner ends the box-sections are also provided withoffstanding concavoconvex walls 15, which are substantially semicircularin cross-section and cooperate in like the corresponding side of thewall 15, so as to rotate thereon; but the innerside thereof, owing toits fiat form, stands outward from 'the inner side of the said wall 15,thereby forming a space or chamber 16, in which the dirt, dust, or sandwhich may find its way into the inner end of the bearing is retained andprevented by the collar from passing into the bearing-cham ber proper.From the walls 15 the inner ends of the box sections or plates areformed with semicircular projections 17, adapted when the parts areassembled to'register and snugly fit about the shaft and prevent, as faras possible, the entrance of dirt and other foreign substances betweenthe box-sections. The wall 14 of the upper bearing-section is providedat the front with a screw-threaded oil-inlet 18, which is normallyclosed by a screw-plug 19. Through this inlet oil or other lubricatingmaterial may be supplied to the journal-chamber, and the action of thejournal in revolving effects the feed of the same to the entire surfaceof the bearing, thus forming in effect a self-lubricating bearing. Apacking-strip 20,0f leather, rubber, or other equivalent material, isapplied between the flat outer edges of the boxsections surrounding thebearing and dirt chamber and cooperates with the latter to exclude dirtand dust from the said bearingchamber. By this means a practicallydustproof bearing is provided.

The arms 21 of the yoke 10 are forked at their lower free endsto providearcuate straps '22, which straddle the inner reduced or tapered endportions of the walls 14 of the upper box-sections, and thereby act asstays to reinforce the same against strain, and these straps terminatein feet 23, which are secured to the boxes by the bolts uniting thesections of the latter to each other. The central portion of the yoke isprovided, as usual, with an eye 24 for passage of a bolt or swivelconnection to unite it to the beam of the plow.

In the modification shown in Fig. 7 the journal is substantiallyspherical in form and sand-collars are arranged upon each side thereof.This construction is designed to be used where the shaft extends throughthe bearing-boxes and it is necessary to make provision to exclude dustat both ends of the bearing. The changes required to adapt the boxes foruse in connection with this form of journal will be readily understood.

It will also be understood that while the construction of shaft journaland bearing is primarily designed for use in connection withplow-colters we do not limit the application of the invention thereto,as the same may beadvantageously employed in machine structures ofvarious kinds. Hence changes in the form, proportion, and minor detailsof construction may be made within the scope of the invention withoutdeparting from the shafts, a shaft having an enlarged tapered journaland a sand-collar located at 'or near the reduced end of the journal, inconibina tion with a box comprising cooperating parts having matchingconcavo convex portions forming cham bers for said journal and collar.

3. In ajournal-bearing for colter and other journal and a sand-collar ator near the reduced end of the journal, and a box compris ingcooperating top and bottom plates having shafts,'a shaft having a tuber'or knob like outpre'ssed concavo-convex walls forming chambers for saidjournal and collar. v

4. In a journal-bearing for colter and other shafts, a shaft having arounded journal taporing inwardly and a sand-collar located at or nearthetapered end of the collar'and having a curved outer side rounded onfabevel and a substantially straight inner side, combined with a boxformed of top and bottom plates having corresponding concavo-convexwalls forming chambers for said journal and collar, the journal-chambercorresponding in form thereto and the collar-chamber being ofapproximatelysemicircular form in cross-section to form a dirt-retainingspace at the inner end thereof, substantially as described.

5. In a colter, the combination'of 'a shaft having enlarged,inwardly-tapering journals and collars adjacent thereto, boxes havingconcavo-convex walls forming chambers for the reception of the journalsand collars, and a yoke having forked ends straddling the concavo-convexwalls.

6. In a colter, the combination of a shaft having a rounded journal andsand-collar at each end, boxes therefor having concavo-convex wallsforming chambers for thejournal and collar, and a yoke having forkedends fitting into the space between the concavo convex walls of each boxand secured, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

ROBERT W. OOOMBS. ,[L. s] LOUIS A. BROOKS. [L. s] Witnesses:

C. W. MCELROY, Tnos. H. PUGH.

